Steam-boiler furnace



(No Model.) 2 sheets-sheet 1Q H KORTEN STEAM BOILBR FURNAGB.

Paten-ted July 30, 1895.

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KORTEN. STEAM BOILER PURNAGE.

No.`543,739. Patellisedv July 30, 1895.

w Lwl www@ UNITED ISTATES PATENT OFFICE.

HENRY KORTEN, OF BURLINGTON, IOWA.

STEAM-Boites FURNACE.

SPECIFICATION forming part of Letters Patent No. 543,739, dated J' uly30, 1895.

Application tiled October 22, 1894. Serial'No. 526,619. (No model.)

.To all whom may concern,.-

Be it known that I, HENRY KoRTEN, a citizen of the United States,residing at Burlington, in the county of Des Moines and State of Iowa,have invented certain new and useful Improvements in Steam-BoilerFurnaces; and I do hereby declare the following` to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make'and use the same.

My invention relates to improvements in furnaces for steam-boilers inwhich superheated steam, heated air, or both, are injected into the fuelin the tire-box, thus aiding in promoting combustion.

The invention consists in the novel construction and combination ofparts hereinafter fully described and claimed.

In the accompanying drawings, Figure lis a cross-sectional view on theline x, Fig. 3, of a steam-boiler furnace constructed in accordance withmy invention, looking toward the rear. Fig. 2 is a horizontal section ofa portion of the furnace on the line y y, Fig. 3. Fig. 3 is a centrallongitudinal section. Fig. 4 is a detail sectional view, on an enlargedscale, of one of the inner plates for the inelecting-chambers. Fig. 5 isa sectional view similar to Fig. l, showing a modified construction.Figs. 6 and 7 are detail perspective and plan views, respectively, ofone of the tilesin the modified construction.

In the said drawings the reference-numeral 1 designates the furnacewalls or casing, made of brick, as usual, and provided with abridgewall2, ahrc-lining 2a, and a second or supplemental bridge-wall 3, withopenings 4 and 5 between their upper ends and the boiler 6,

a metal plate 7 extending across thesecondary bridge-wall, which aids insupporting 'the boiler.

The numeral 8 designates the grate-bars, 9 the fuel-chamber, and 10 theash-pits, which chambers are to be provided with doors, as usual. Thefire-lining of the furnace at the sides and rear above the grate isremoved and angle-plates substituted therefor. The tire-lining is alsoremoved below the grate, forming a passage-way 13, communicating withthe ash-pit at the sides by openings 13a.

These plates consist of two plates 14 and 15', bolted together, as seenin Fig. 4. at an obtuse angle, and the lower plate l5 provided on itsunder side with lugs 16, which engage between the gratebars and hold thesame in place. When in position, as seen in Fig. 1, the plate l5occupies a horizontal position, while the plate 14 is inclined, so thatthe chambers 12, formed by the plates and fur-l nace-walls, willbeltriangular in shape. These plates are provided with a fire-lining 17of tire-brick or other refractory material, having a series ot' ports oropening 18 therein, which register similar ports or openings 19 in theplates 14. The object of inclining said plates 14 is to prevent thelining from falling into the fire-box, and also to economize in space.The said injecting-chambers communicate with a similar chamber 20, inbridge-wall 2, having a port or opening 2l leading to the ash-pit. Atthe upper end of said chamber the bridge-wall is cut away and anangleplate 23 placed at the front thereof. This angle-plate consists ofplates 24 and 25, similarly bolted together and similar to plates 14 and15, in all respects, except that they are set at a right angle to eachother and the lugs 16 dispensed with, they being formed with ports oropenings 26 and a tire-lining 27, with corresponding ports 28. The plate24 is inclined, as seen in Fig. 1, and the opening in the bridge-wall iscorrespondingly inclined to permit plate 25 to properly seat thereon.

The numeral 29 designates a superheated steam or hot-air pipe located insaid injecting-chambers 12 and 20, formed at points intermediate theports or openings leading to there-box, with apertures 30, through whichsteam, mixed with hot air, which enters the injecting-chambers from theash-pit, is injected into the fire-box. The ends of this pipe areconnected with a horizontal pipe 3l, which,in turn, is connected with apipe 32 leading to the steam-dome or other part of the boiler.

ing-chambers is located a similar pipe 34, having jet-openings 35, andconnected with pipe 2,9. In the rear injecting-chamber is a verticalpipe 36, communicating with the upper pipe 3l, and is connected with ahori- In the lower part of the inject- IOO zontal pipe 37, havingjet-apertures therein for directing the steam directly into the fireboxtoward the front thereof. These pipes 34 and 37 may be dispensed with insmall furnaces.

At the front of the furnace above the grate is a pipe 3S, communicatingwith pipe 3l, havinga head 39, provided with a number of radial openingsor steam-passages 40.

The dilferent doors inthe ash-pit are to be provided with suitabledampers or valves and operating-rods whenever necessary, and the jet-pipes ai'. proper points are provided with suitable stop-cocks.

The operation will be readily understood. Steam from the boiler will besupplied to the jet-pipes and superheated therein and will issue in jetsand be injected above the b 'urning fuel, thus greatly aiding ineffecting complete combustion.

Instead of employing steam, air maybe injected into the fuel, in whichcase the pipe is disconnected from the steam-dome and con nected with asuitable blower.

The holes in the side jet-pipes are drilled so as to point slightlybackward, while those in the rear pipe point directly forward, as such Ihave found to give the most satisfactory results.

In the modification shown in Fig. 5 the inclined side plates are removedand a section of the fire-lining removed and tiles of a peculiarconstruction' substituted therefor. These tiles (shown in Figs. 6 and7), consist of rectangular blocks 4l, of lire-clay or `terracotta,having a vertical recess 42, a horizontal groove 43 at the rear upperedge, in which the pipe 23 is located, and a recess 45 on topcommunicating with the recess 42 and forming a port for the escape ofsteam from said pipe. The vertical recess 42 communicates with the portleading to the ash-pit.

In the constructions above described the jets in the pipes are set atdifferent angles, so that there is produced a thorough commingling ofthe gases of combustion withthe gases formed by the steam from the jetsand the airdrawn in through the ports. Thesejets crossing and recrossingeach other produce conti loting currents, causing thewhole volume ofgas, steam, air, and smoke to be thrown into violent commotion,producing complete mixing and perfect combustion.

Having thus fully described my invention, what I claim is- 1. Thecombination in a steam boiler furnace having injecting chambers in theside and bridge walls, of the jet` pipe located in said chambers, theangle plate, having ports therein, located on the bridge wall and thefire lining supported thereby, the angle plates at each side of thefurnace located above the grate and provided with fire linings andports, and the lugs formed integral with the horizontal portions of saidplates and adapted to engage between the grate bars, substantially asdescribed.

2. The combination in a steam boiler furnace having injecting `chambersin the side and bridge walls, and communicating with the fire box andash pit, of the upper and lower jet pipes located in said chambers, thevertical pipe located in the rear injecting chamber, connected with thelower vjet pipe, the horizontal pipe at the upper end thereof, theinclined angle plate at the rear of the lire box, the fire liningsupported thereby having ports communicating with the fire box and theinjecting chamber in the bridge wall, the angle plates at the sides ofthe lire box, having ports therein and provided with a tire lining, andthe lugs on the under side of the horizontal portion of said side angleplates and formed integral therewith, substantially as described.

3. The combination in a steam boiler furnace, having portsin the sidesleading to the ash pit, of the tiles located in the sides of the furnaceabove the grate formed with a' horizontal recess in their upper ends, arear vertical recess communicating therewith and with the port leadingto the ash pit, and a groove in the upper rear edge, the pipes 1ocatedin said groove and in the ash pit, substantially as described.

In testimony whereof I affix my'signature in presence of `two witnesses.

HENRY KORTEN.

Witnesses:

GEORGE S. BAILY, J. D. GORMAN.

